Going green neither boosts nor dents hotel revenues, according to a study released this week by the Cornell Center for Hospitality Research.

The study monitored sales and rates at 9,000 hotels: 3,000 that had earned Sabre's "Eco-Certified Hotel" label and 6,000 that had not. The analysis showed that, on average, the distinction made little difference in sales and rates. "We can conclude that going green is compatible with existing quality standards of hotel service and that advertising green status doesn't hurt a hotel's revenues," according to Cornell assistant professor Howard Chong. "But it may not help, either."